package com.example.study;

/**
 * @Author: leo
 * @date: 2022/5/8
 */
public class Test {

    public static void main(String[] args) {
        double r1 = 3.0;
        double u1= calculate(r1,2.0);
    }


    static int calculate(double r, double i){
        double u = r*i;
//        String s1 = new String("s1");
        String s1 = "s1";
        int result = 10;
        return result;
    }

    //怎么写一个放
}
